From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6863AC433EF for ; Fri, 20 May 2022 19:19:30 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1353169AbiETTT2 (ORCPT ); Fri, 20 May 2022 15:19:28 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48178 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1347963AbiETTT1 (ORCPT ); Fri, 20 May 2022 15:19:27 -0400 Received: from mail-pj1-x1033.google.com (mail-pj1-x1033.google.com [IPv6:2607:f8b0:4864:20::1033]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id F22B217CC8A for ; Fri, 20 May 2022 12:19:25 -0700 (PDT) Received: by mail-pj1-x1033.google.com with SMTP id w17-20020a17090a529100b001db302efed6so8603365pjh.4 for ; Fri, 20 May 2022 12:19:25 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=networkplumber-org.20210112.gappssmtp.com; s=20210112; h=date:from:to:cc:subject:message-id:mime-version :content-transfer-encoding; bh=sZCDKTVgneDIxzDry0m467r/lxyqae6S6IpOW/q5QjY=; b=s9df+Z2cfFFwAk1/h6d8nArIkMn1r8Vb8Avshcpt4G/juKUoo12pEW/2elO5yvp2u6 lW+b3Iu32Tq40LUVsibLYdTOy68wQkybh5NpqPm6a4hP3YF6f/fmfpe+2wvgJlT7mF3S dUzlNC4RvuHDN0Xj8uWHUD6ZIt3TQ6NpME84n5k/dpGSmF+tyfW0MQQPbBxftcoCGrpd rx3prrwRyOK6j7k25eH4bHFm+e5clf6X6b1+zwBu70r/+GM3XsOgmk69efCr+8ZcO+Ob S4/i6SxoVYrhMQUlkIJ8iFUGwprnn8JUoQUQ4Ge8BOwG3sKWAYP59DWvfKHNj7c6to0E IYNA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:date:from:to:cc:subject:message-id:mime-version :content-transfer-encoding; bh=sZCDKTVgneDIxzDry0m467r/lxyqae6S6IpOW/q5QjY=; b=LhiMSrxOQPiUtqOqotFM9GOw6cgxRVzXTO+gTORu/jtsa4oHWPQ0qrc3EK2vB8vmzr 0o21P/5F6nRyyYRxii9EfMk0Y/bksADxiE/iqrPd7P04LKu8pvpj7//KMbRO1KnXsOnc U1EVNj/LTC3gIxeXAYUezxI7grY8HB0v+MLbdF6TL1FeztwpZ/f0wcdT8s1chd6Y50Z6 4UztHq4wEFjTrQbhYNerjzyP+sQodngPtoZJrrZRCMUmvCUrRzegGCfaoxJ4XMHkssw2 qeIVcBuUKmquI9fkuRW0DdSee0cmlH3CN9DfAE6D2cD+DNKiPMds2W+tBOsnAZHShzjb F/oA== X-Gm-Message-State: AOAM533HyNL639cjdSgLESYieubE/V/4cRqnrLSG6e8cwEmFOQAHP/NO ZL+LIEOnMfK9MnIHin+EsedEjw== X-Google-Smtp-Source: ABdhPJyPbMYHHjZJwqXKcMhWN48PKIY1GN4ALTi4MRGGZvzox3nCPJhCqk2YGF36mqyHR0abzk1xrQ== X-Received: by 2002:a17:902:ef8f:b0:161:e39c:2f15 with SMTP id iz15-20020a170902ef8f00b00161e39c2f15mr8007374plb.165.1653074365453; Fri, 20 May 2022 12:19:25 -0700 (PDT) Received: from hermes.local (204-195-112-199.wavecable.com. [204.195.112.199]) by smtp.gmail.com with ESMTPSA id o66-20020a62cd45000000b0050dc76281b3sm2224929pfg.141.2022.05.20.12.19.24 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 20 May 2022 12:19:24 -0700 (PDT) Date: Fri, 20 May 2022 12:19:21 -0700 From: Stephen Hemminger To: Steffen Klassert , Herbert Xu , "David S. Miller" Cc: netdev@vger.kernel.org Subject: Warnings build iproute2 with gcc-12 in xfrm Message-ID: <20220520121921.4b0f2a5d@hermes.local> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org Iproute2 now gets warning in xfrm code with Gcc-12 In function =E2=80=98xfrm_algo_parse=E2=80=99, inlined from =E2=80=98xfrm_state_modify.constprop=E2=80=99 at xfrm_stat= e.c:573:5: xfrm_state.c:162:32: warning: writing 1 byte into a region of size 0 [-Wstr= ingop-overflow=3D] 162 | buf[j] =3D val; | ~~~~~~~^~~~~ Fixing it properly would be hard since buf points to element in alg union w= hich can be from xfrm.h. I.e: struct xfrm_algo { char alg_name[64]; unsigned int alg_key_len; /* in bits */ char alg_key[0]; }; Looks like use of legacy zero sized arrays in uapi is the underlying root c= ause. Any good suggestions on best fix here?